why does my Honda Pilot YF3 (2016-2022) have a spongy brake pedal

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is on a flat surface and securely lifted with jack stands.
• Wear safety goggles and gloves.

2. Check and Replace Brake Fluid

• Sub-steps:
  1. Remove the cap from the master cylinder reservoir.
  2. Inspect brake fluid for contamination; it should be clear and free of debris.
  3. If fluid is contaminated, drain the old brake fluid from the system and replace it with new fluid (DOT 3 or DOT 4 as specified).
  4. Bleed the brake lines to remove any air pockets. Start from the rear passenger side, then rear driver side, followed by front passenger side, and finally front driver side.
• Tools Required: Brake bleeder kit, wrench, funnel.

3. Inspect and Replace Brake Components

• Sub-steps:
  1. Remove the wheel to access the brake components.
  2. Inspect brake pads for wear; replace if thickness is below 3mm.
  3. Check rotors for scoring or warping; replace if necessary.
  4. Replace any damaged brake lines or hoses.
  5. Reassemble components and reinstall the wheel.
• Tools Required: Socket set, torque wrench, brake cleaner, replacement pads/rotors as needed.

4. Test Brake Booster and Master Cylinder

• Sub-steps:
  1. Disconnect the brake booster vacuum line and inspect for cracks or leaks.
  2. Bench-test the master cylinder by applying pressure and checking for leaks.
  3. Replace the master cylinder if it fails the test.
• Tools Required: Vacuum gauge, replacement master cylinder if needed.